Ensure that Docker's default bridge "docker0" is not used

낮음레벨 2자동docker

설명

Containers on the default bridge (docker0) can reach each other without restriction and are exposed to ARP spoofing; user-defined networks should be used. Flags containers attached to the network named bridge. The audit inspects every running container (docker ps -q) and prints the offending names; a host with no running containers is compliant.

점검 방법

감사 방식: 셸 명령

shell

ids=$(docker ps -q) || exit 1; [ -z "$ids" ] && { echo compliant; exit 0; }; out=$(docker inspect --format '{{.Name}}{{range $n, $_ := .NetworkSettings.Networks}} {{$n}}{{end}}' $ids) || exit 1; bad=$(printf '%s\n' "$out" | awk '{for(i=2;i<=NF;i++) if($i=="bridge") {print $1; break}}'); [ -z "$bad" ] && echo compliant || printf '%s\n' "$bad"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Create user-defined networks (docker network create ...) and attach containers to them instead of the default bridge.

속성

운영 체제: 모두
태그: dockerruntimenetwork
참고 자료: CIS Docker Benchmark v1.9.0 - 5.30 Ensure that Docker's default bridge "docker0" is not used

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감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target docker --level 2